Thorough evaluation of all twin pregnancies is necessary if prenatal diagnosis of conjoined twins is to be made more often. Application of sonography, amniography, and amniocentesis is helpful in formulating prognosis, details of delivery, and subsequent assessment. Two-dimensional echocardiography, radionuclide scanning, computed tomography, and sonography are recently developed techniques for evaluation of the neonates. Detailed planning at all stages of care is essential. Interaction among medical personnel and the family is extremely important.